Working on the engine cowls. I had to remove three small louvers from each of the cowls (just to the right of the puttied seam) as per the "U10" instructions. WNW instructions call for filling these seams on both sides of the fuselage...I use Squadron Green putty diluted with a little Testors liquid cement. I'll sand them flush when the putty dries. The exhaust is not cemented into place yet. I will do some painting first and then attach.